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Supplemental Information

Raw data (studies 1, 2, 3)

DOI: 10.7287/peerj.preprints.1206v1/supp-1

Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Mutsumi Teraoka conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Makoto Kyougoku conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Human Ethics

The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):

The Ethics Committee of Kibi International University and the research ethics committee of partnership hospitals approved all research protocol and informed consent procedures (No. 13−30). Written informed consent was obtained from all the participants. We provided participants with a letter explaining the outline and purpose of the study. Participants received the right to drop out of the research project at any time without any reason. We regarded the return of the survey sheet as consent for participation in this research. Survey sheets were returned in anonymous, sealed envelopes.

Funding

The authors received no funding for this work.


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